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Individual pitch control method for wind generator unit based on robust control

A technology of independent variable pitch and wind turbines, applied in wind power generation, wind turbines, control of wind turbines, etc., can solve problems such as low system self-adaptability, lack of research, and decreased accuracy

Inactive Publication Date: 2016-01-06
NARI TECH CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a lack of research on the overload of wind turbines caused by extreme wind conditions, and the method of fuzzy control depends on knowledge rules, the self-adaptive ability of the system is not high, and it is easy to cause the accuracy to drop

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  • Individual pitch control method for wind generator unit based on robust control
  • Individual pitch control method for wind generator unit based on robust control
  • Individual pitch control method for wind generator unit based on robust control

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Embodiment Construction

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] figure 1 It is a schematic flow chart of an embodiment of the robust control-based independent pitch control method for wind turbines provided by the present invention, figure 2 is the schematic diagram of the wind turbine independent pitch control method based on robust control, such as figure 1 shown, including:

[0037] S101. Control the output fan's unified pitch angle through the PI controller to control the feedback power Pmea and the rated power Pr...

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Abstract

The invention discloses an individual pitch control method for a wind generator unit based on robust control. The individual pitch control method comprises the steps that the uniform pitch angle of a wind turbine is output through control of a PI (Proportional-Integral) controller according to the feedback power and the rated power of the wind turbine; the azimuth angle weight coefficient of each blade is calculated according to the actually measured azimuth angle of the corresponding blade; an expected pitch angle is reassigned to each blade according to the azimuth angle weight coefficient of the corresponding blade; a robust self-adaption individual pitch controller is designed according to the expected pitch angle of each blade; and individual pitch control is performed on the wind generator unit. By adopting the individual pitch control method disclosed by the invention, the control effect and the control precision can be improved.

Description

technical field [0001] The invention relates to the field of new energy technology, in particular to a robust control-based independent pitch control method for wind turbines. Background technique [0002] There are two forms of pitch control: unified pitch and independent pitch. The unified pitch system implements synchronous regulation and control on the three blades of the wind turbine through the actuator. With the increase of wind turbine assembly capacity, tower height and wind rotor radius, its shortcomings are also exposed. First of all, the prerequisite for unified pitch adjustment is that the wind speed in the sweep plane of the wind rotor is the same, of course, this is impossible in practice. When the megawatt-class generator set is running at the rated wind speed, the highest The difference in wind speed between the lowest end and the lowest end results in a 20% difference in absorbed power, which makes uniform pitch no advantage. Secondly, due to the differe...

Claims

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Application Information

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IPC IPC(8): F03D7/02
CPCY02E10/72
Inventor 陈磊胡丽萍曾雨竹蔡国洋
Owner NARI TECH CO LTD